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GSM-205-323
DDF
31st Oct 01
Technical Description: Horizon
macro
indoor
68P02902W07-B
CONTROLLED INTRODUCTION
Tech. 5–45
DDF functional
diagram
Figure 5-30 shows a functional diagram of the DDF.
Figure 5-30 Functional diagram of the DDF
DDF connectors
Each DDF connects to:
The Tx outputs of three or four CTUs, using:
– Two SMA connectors underneath the DDF.
– An N-type connector on top of the DDF for connection to a
feedthrough plate (for a third CTU) or HCU plate (for combined
third/fourth CTUs).
A single antenna for both Rx and Tx, using a 7/16 connector. This
connector is on top of the DDF.
The SURF, using an N-type connector. This connector is on top of the
DDF.
NOTE
All unused SMA inputs to DDF modules must be fitted with
50 ohm load terminations.